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# Geometry Basics IV

### Geometric Properties, Including Symmetry, Movements, Comparison, Misc.

Term | Definition |
---|---|

Perimeter | The distance around a polygon, found by adding the lengths of the sides |

Area | The number of square units needed to cover a region, found by multiplication |

Volume | The number of cubic units needed to fill a solid figure, found by multiplication |

Height | The dimension that must be multiplied by the length and width to determine volume |

Exponent | The tiny raised number (a 2 or 3) that must be written next to the unit in area or volume |

Line symmetry | The property of a figure that can be folded and the two parts will match |

Line of symmetry | The vertical, horizontal, or diagonal line on which you fold a figure to get two matching sides |

Congruent | Figures that have the same size AND shape |

Similar | Figures that have the same shape but are NOT the same size |

Asymmetrical | A figure that CANNOT be folded along a line so that the two parts will match |

Slide | Also called a translation, sliding a figure in a straight line |

Flip | Also called a reflection, flipping a figure over a line |

Turn | Also called a rotation, turning a figure around a point or vertex |

Transformation | A movement of a figure that does not change the size or shape |

Apex | The point where the triangular faces of a pyramid meet |

Translation | Sliding a figure in a straight line |

Reflection | Flipping a figure over a line |

Rotation | Turning a figure around a point or vertex |

Complementary Angles | Two angles that add up to 90 degrees |

Supplementary Angles | Two angles that add up to 180 degrees |

Created by:
Rvanmeter